Support staff will be at the high school beginning at 8 a.m. Monday "for as long as it is necessary" and has materials for parents to talk about grief with their children, the district said in the statement.

Witnesses of Monday's incident told police that Skalla was the only one "to throw punches." Police said Skalla left the park with his family after the assault, in a vehicle which was photographed by a witness. The photograph helped lead police to the vehicle, which was owned by Skalla's girlfriend, who was not identified by police.